M&M's World was four floors of chocolatey goodness! So much fun that we had to go twice! It is mainly a gift shop with clothes, blankets, toys, collectibles, and of course many different kinds of M&M's. Along with the candy, they have an evolution of the M&M promotional designs on the walls and a short 3D movie to enjoy!
I bought a Christmas ornament and a blanket but as much as I would have loved to buy some M&Ms, I wasn't sure if they were going to survive the walk back to the hotel since it was over 100 degrees outside. If you have some time to kill and you're deciding between Hershey Chocolate World and M&M's World, definitely go with the latter. You won't regret it!